@article{PA_2018_7_3_a6,
     author = {O. A. Krivosheeva and A. S. Krivosheev},
     title = {Singular points for the sum of a series of exponential monomials},
     journal = {Problemy analiza},
     pages = {72--87},
     publisher = {mathdoc},
     volume = {7},
     number = {3},
     year = {2018},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PA_2018_7_3_a6/}
}